Allow setting per-file compression via SMB2/3

[karo-tx-linux.git] / fs / cifs / smb2pdu.c

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 6e18686112333c27d47b44fe6e3ae5596b5d6361..bbafa12e83b20cfa70b70bba917a15fbecc5c288 100644 (file)
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1247,6 +1247,33 @@ ioctl_exit:
        return rc;
 }
 
+/*
+ *   Individual callers to ioctl worker function follow
+ */
+
+int
+SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
+                    u64 persistent_fid, u64 volatile_fid)
+{
+       int rc;
+       char *res_key = NULL;
+       struct  compress_ioctl fsctl_input;
+       char *ret_data = NULL;
+
+       fsctl_input.CompressionState =
+                       __constant_cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
+
+       rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
+                       FSCTL_SET_COMPRESSION, true /* is_fsctl */,
+                       (char *)&fsctl_input /* data input */,
+                       2 /* in data len */, &ret_data /* out data */, NULL);
+
+       cifs_dbg(FYI, "set compression rc %d\n", rc);
+       kfree(res_key);
+
+       return rc;
+}
+
 int
 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
           u64 persistent_fid, u64 volatile_fid)